bug #451 Delete all post/tag entries on delete a Post (yceruto, javiereguiluz)

This PR was merged into the master branch.

Discussion
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Delete all post/tag entries on delete a Post

We can't use cascade delete constraint in this case because Foreign key support is not enabled in SQLite by default. (https://www.sqlite.org/foreignkeys.html#fk_enable)

More information about it:
- doctrine/dbal#2104
- doctrine/dbal#1204

So my only one solution was to clear this relations manually.

Commits
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644d792 Updated the help note
6e1396e Delete all post/tag entries on delete Post

Author: javiereguiluz

src/AppBundle/Controller/Admin/BlogController.php

@@ -177,6 +177,11 @@ public function deleteAction(Request $request, Post $post)
 
         $entityManager = $this->getDoctrine()->getManager();
 
+        // Delete the tags associated with this blog post. This is done automatically
+        // by Doctrine, except for SQLite (the database used in this application)
+        // because foreign key support is not enabled by default in SQLite
+        $post->getTags()->clear();
+
         $entityManager->remove($post);
         $entityManager->flush();